Metallic receptacle and closure therefor



Aug. 4, 1936. w. LOCKHART METALLIC RECEPTACLE AND CLOSURE THEREFOR Filed March 1, 1934 INVENTOR. 7% M-lw v/ I, J. fi om A ATTORNEYS Patented Aug. 4, 1936 PATENT OFFICE 2,049,342; v METALLIC RECEPTACLE AND cLosUaE 'rnsaaroa William Lockhart, Cleveland, Ohio, minor to Cornell Securities Corporation,

Cleveland,

Ohio, a corporation of Delaware Application March 1, 1934, Serial No. 713,461

3 Claims.

This invention is an improvement in metallic receptacles or containers, and relates more particularly to closures therefor and means for removably securing the closures in place to 5 eifect a fluid-tight seal between the receptable and the closure.

In shipping metallic receptacles of the full removable head type, it has been found desirable to provide a clamping device by means of which the cover may be clamped in place with only suflicient security to prevent accidental removal thereof in shipment, as, for instance, where the empty containers are shipped from the manufacturer to the user. It is also desirable in this event, to apply only suflicient closing pressure on the receptacle and the gasket separating the cover flange from the head of the receptacle, to hold the parts together without fully setting or compressing the gasket, so that when the receptacle is filled with its charge and the shipper desires to more effectively clamp the cover thereon in a fluid-tight seal, this may be done conveniently by further pressing the cover flange down upon the gasket to press the latter further against the bead.

It is, therefore, one of the objects of this invention to provide a closing or clamping device for removably securing a cover on a metallic container such as a barrel, drum or the like, to

effect a fluid-tight seal between the cover and the receptable, without the aid of tools.

Another object of the invention is to provide means for imparting a closingpressure uniformly along the cover flange and the bead of the receptacle to bring the same together in fluidtight relation and at the same time to apply such closing pressure in a selective and predetermined manner.

A further object of this invention is to seal the cover in place against unauthorized or accidental removal.

A still further object of the invention is to construct a clamping ring or device for securing covers on metallic receptacles which is simple .45 of construction, extremely durable and inexpensive tomanufacture, and which does not require the use of .separate tools for its application. T

Other objects and advantages of my invention 50 will become more apparent as the following description of an embodiment thereof progresses, reference being made to the accompanying drawing, in which like reference characters are employed to designate like parts throughout the -55 same.

' sealed relation;

In the drawing:--

Figure 1, is a top plan view of one embodiment of my invention, showing the cover clamped in place on a receptacle in fluid-tight Figure 2 is an enlarged fragmentary section taken on line 2-2 of Figure 1;

Figure 3 is a fragmentary plan view of the adjacent ends of the clamping or looking ring, showing the same contracted to seal the cover on the receptacle. In this view the clamping ring has been contracted to its maximum to exert the greatest pressure upon the cover flange and the bead of the receptacle;

Figure 4 is a view similar to that shown in 15 Figure 3 except that the degree of contraction of the clamping device is that used when the drum is shipped empty;

Figure 5 is a cross sectional view' taken on line 5-5 of Figure 3; 20'

Figure 6 is a cross sectional view taken on line 6-6 of Figure 3;

Figure 7 is a fragmentary view similar to the views shown in Figures 3 and 4, and shows the locking lever released to permit expansion of the 25 locking'ring; and

Figure 8 is a section taken on line 88 of Figure 1.

While my invention is particvlarly applicable to metallic containers or receptacles such as 30 barrels, drums and the like, which are provided with a circumferential bead at their open end for receiving and supporting a cover and for reinforcing purposes, it is to be understood that I do a not limit the invention in this respect since the 35 same may be applied to other types of receptacles or containers.

In the accompanying drawing I have illustrated one embodiment of the invention and have shown the same applied to a metallic ship- 40 ping drum'l. The upper edge .of the drum or container is rolled to form a peripheral bead 2 at its open end. A cover 3 comprising a cupped member having a peripheral upwardly and outwardly extending flange 4, supported by the bead 2 and the packing 5 in such a manner that the cupped portion of the cover may be telescoped for a shortdistance within the open end of the container, is illustrated in Figure 2. It will be noted that a portion of the flange l is slightly arcuate in cross section to conform with the approximate curvature of the upper surface of the bead, and that the outer edge of theflange terminates at a point near that defined the greatest outside diameter of the head.

The packing 5 may consist of an annulus of any suitable packing material such as rubber or cork. I find cork to be very satisfactory in use.

It is desirable that the cover be removably secured on the receptacle in such a manner that a fluid-tight seal between the cover, the packing and the bead may be made.

By means of my invention a fluid-tight seal between these parts is readily accomplished, as a further description of the embodiment of my invention shown in the drawing will; reveal. According to the present invention one simple means for removably securing the cover on the receptacle in fluid-tight relation may include a split contractible channeled clamping ring 6 which is substantially U-shaped in cross section and in'which the upper and lower flange and bead engaging walls respectively of the ring converge outwardly toward the arched portion I such as is indicated more clearly. in Figure 2.

While I have, described a ring which is contracted to press the cover into sealing relation with the receptacle, it is to be understood that the invention may be equally well applied to a ring which is expanded to press these parts together.

It will thus be seen that by contracting the ring, the cqver flange 4 will be pressed tightly against the packing 5 and the supporting bead 2 under a closing pressin'e exerted thereagainst uniformly throughout the circumference of the ring.

The contractible, channeled ring 6 is substantially U-shaped in cross section and is split transversely, preferably at one point as indicated in Figure 1. Lugs 8 and 8 extend inwardly from the ring ends defining the split and may be formed integrally with the ring end or may be formed separately and welded thereto.

In further carrying out the invention I have provided means for contracting and expanding the ring about the open end of the receptacle to removably secure the cover in place, and such means may consist of an operating lever 9 pivoted at II) to the lug 8. The lever 9 is provided with an operating handle portion II which is preferably arched to conform to the curvature" of the receptacle wall. The lever 9 is preferably slotted or cut away as at l2 in the form of a substantially L-shaped slot for purposes which will be more fully described hereinafter although this slot may be cut directly out of the forward edge of the lever as distinguished from the body portion between the forward and rearward edges. Adjacent the cut-awa'y portion l2 of the lever it is desirable to provide additional lever material to strengthen the same on one of its sides. This may be done by permitting a portion of the lever material to project rearwardly as at l3.

The lever is connected with the opposite end of the split ,contractible ring by means of one or more links I4. While it is possible to employ the use of but one link l4 connecting the lever with the other end of the ring, I have found it to be more desirable to employ two such links ll operating on opposite sides of the lever and on opposite sides of the lug 8 to which they are pivotally connected as at IS.

The opposite ends of the links I are connected by means of a headed pin or rivet l6 which is adapted to. pass through and operate within the cut out or notched portion I! of the lever 9.

It will be noted that thecut out portion I! of the lever is substantially L-shaped and provides two seats or bearing recesses l1 and IQ for receiving the pin 16. As illustrated in the drawing, when the pivot pin I6 is placed to operate in the seat I! (Figure 4), and the lever is moved to the position shown, the ring will be con- 5 tracted to only partially press the cover down on the receptacle. As pointed out above, this adjustment is employed in shipping the drums empty and where it is not desired to fully set the gasket to provide a fluid-tight seal.

However, when such a seal is desired, the links are placed so that the pin l6 operates in the seat l8 representing a greater radius on the axis I0 than the radius between the axis l0 and the seat l1. Due to the greater radius of the throw, when the pin is in the position shown in Figure 3, the degree of contraction of the ring will be increased somewhat, and the pressure exerted upon the bead 5 and the cover flange 4 will be increased sufliciently to insure a fluid-tight seal 20 between the cover and the bead.

The lever 9 may be provided with a projection or shoe 2!! adapted to engage the inner upright wall of the cover under increasing pressure as the lever is moved toward full ring contracting posi- 25 tion. In this manner the closing pressures are found to be more evenly distributed about the periphery of the ring since as the shoe begins to engage the cover, the substantially diametrically opposite side of the ring will first be pressed 80 firmly in place, while increased pressure of the shoe against the cover as the lever is moved,

will cause the closing pressures to gradually and uniformly creep around both sides of the ring toward the point where the shoe is in en ement with the cover.

While I have not shown in the drawing an application of the pivot adjustments I! and I8 to the pivotal connections 10 and I5, it is to be understood that I intend such applications to be contemplated by this invention.

For instance, the pivot connection III of the lever with the lug 8, instead of being flxed as shown may be in the form illustrated at I! and I8, that. is, the fulcrum of the lever may be shifted to a plurality of positions to predetermine the extent of the lever throw and thus determine the force of the contracting pressures applied to the ring and cover flange and bead. Likewise, the pivot connection l5 between the links and the other lug 8' may be similarly designed for such adjustment Furthermore, the cut away portions I I and ill need not be located within the lever, but may be formed along the outer edge thereof in a series of notches.

From the above description, it will be noted that my invention provides for a simple clamping device for removably securing a cover on a receptacle in fluid-tight relation, and that the 60 same is easy to operate without the aid of separate tools. Furthermore, the invention provides for such a device which is extremely sturdy and capable of exerting tremendous pressures to press the cover flange and bead together when a fluid-tight seal is desired, while the device may be selectively adjusted and operated to exert scope of the appended claims. 76

I claim:

1. In a clamping device for a metallic receptacle having a bead rolled about its open end and a cover having a flange fitting over the bead, a contractible channeled clamping ring having portions engaging the bead and cover flange to press the same togetherwhen the ring is contracted, and means for contracting the ring including a lever pivotally connected with a portion of the ring and a link pivotally connecting said lever with another portion of the ring, said lever' having an L shaped slot formed therein for adiustably receiving an end of. said link.

I 2. In a clamping device for heavy gauge metallic shipping receptacles having a beadrolled about its open end and a cover having a flange fltting over the bead, a transversely split contractible channeled clamping ring having portions engaging the bead and cover flange to press the same together when the ring is contracted, and means for contractingthe ring including a lever pivotally connected with an end of the ring for horizontal movement in the plane 01' the ring, said lever having an L shaped slot therein, and a member connecting the other end of the ring with said lever and having a portion slidable in said slot to selectively engage 5 the extremities thereof.

3. In a clamping device for heavy gauge metallic shipping receptacles having a bead rolled about its open end and a cover having a flange fltting over the bead, a transversely split con- 10 tractible channeled clamping ring having portions engaging the bead and cover flange to press the same together when the ring is contracted, and means for contracting the ring including a lever member pivotally connected [5 with an end 01' the ring for horizontal movement in the planeoi the ring, and a member connecting the other end of the ring with said lever, one of said members having an L shaped slot formed therein and the other member hav- :0

ing a portion slidable in said slot to selectively engage the extremities thereof.

WILLIAM LOCKHART. 

